建立了超高效液相色谱-串联四极杆质谱测定饲料中苯乙醇胺A残留的分析方法.用磷酸甲醇溶液提取饲料中的苯乙醇胺A,经MCX柱净化、富集后,在正离子模式下以乙腈和0.1%甲酸水溶液为流动相进行梯度洗脱,Waters超高效BEH C18色谱柱(100 mm×2.1 mm,1.7 μm)分离,电喷雾离子源电离,多反应监测(MRM)模式下进行定量和定性分析.结果表明,苯乙醇胺A在0.5~ 100 μg/kg范围内的峰面积与含量线性相关(相关系数(r)>0.999),其定量限(S/N)为10 μg/kg,方法回收率为79.6%~ 86.2%,相对标准偏差(RSD)为3.1%~6.7%.多次测定饲料样品表明该方法操作方便、测定结果可靠.
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